How to replace printer cartridges?

[has]

Hello, I have an Epson Stylus DX7450. I have been having trouble with the quality of prints & I am in need of some help.
I have un-installed everything to do with Epson on the laptop & now re-installed it using the software CD-ROM.
However, the printer is showing the orange light which means one or more of the cartridges needs replacing.
Having un-installed the software, I inserted 4 new cartridges of Black, Magenta, Cyan & Yellow & they are yet to be used & still, the light is illuminated.
I need advice on how to overcome this problem (& at the moment, it is a very BIG problem).
I would appreciate any help & advice.

[Buenchico]

First, try to find out if Epson's software will tell you which cartridge it thinks is empty.

Go to Start > Control Panel > Printers/Printers and Faxes; right-click on the Epson printer icon and then left-click on Printing Preferences. Click on the 'Maintenance' tab. Click 'Epson Status Monitor'. Hopefully that will show which cartridge is the cause of the problem. (I've not got an Epson printer, so I'm not sure as to exactly what you'll see there).

Epson print cartridges have a chip, which monitors the ink level. If you've inserted genuine (but pricey!) Epson cartridges, there shouldn't be a problem (unless the cartridge was made with a duff chip). However, if you've used cartridges supplied from elsewhere, they're probably recycled cartridges. The manufacturer should have reset the chip to indicate that the cartridge is full but, if that's not been done, there's the cause of your problem.

Chris